api

type ExtenderArgs struct {
	// Pod being scheduled
	Pod *v1.Pod
	// List of candidate nodes where the pod can be scheduled; to be populated
	// only if ExtenderConfig.NodeCacheCapable == false
	Nodes *v1.NodeList
	// List of candidate node names where the pod can be scheduled; to be
	// populated only if ExtenderConfig.NodeCacheCapable == true
	NodeNames *[]string
}

type ExtenderBindingArgs struct {
	// PodName is the name of the pod being bound
	PodName string
	// PodNamespace is the namespace of the pod being bound
	PodNamespace string
	// PodUID is the UID of the pod being bound
	PodUID types.UID
	// Node selected by the scheduler
	Node string
}

type ExtenderBindingResult struct {
	// Error message indicating failure
	Error string
}

type ExtenderConfig struct {
	// URLPrefix at which the extender is available
	URLPrefix string
	// Verb for the filter call, empty if not supported. This verb is appended to the URLPrefix when issuing the filter call to extender.
	FilterVerb string
	// Verb for the preempt call, empty if not supported. This verb is appended to the URLPrefix when issuing the preempt call to extender.
	PreemptVerb string
	// Verb for the prioritize call, empty if not supported. This verb is appended to the URLPrefix when issuing the prioritize call to extender.
	PrioritizeVerb string
	// The numeric multiplier for the node scores that the prioritize call generates.
	// The weight should be a positive integer
	Weight int
	// Verb for the bind call, empty if not supported. This verb is appended to the URLPrefix when issuing the bind call to extender.
	// If this method is implemented by the extender, it is the extender's responsibility to bind the pod to apiserver. Only one extender
	// can implement this function.
	BindVerb string
	// EnableHTTPS specifies whether https should be used to communicate with the extender
	EnableHTTPS bool
	// TLSConfig specifies the transport layer security config
	TLSConfig *ExtenderTLSConfig
	// HTTPTimeout specifies the timeout duration for a call to the extender. Filter timeout fails the scheduling of the pod. Prioritize
	// timeout is ignored, k8s/other extenders priorities are used to select the node.
	HTTPTimeout time.Duration
	// NodeCacheCapable specifies that the extender is capable of caching node information,
	// so the scheduler should only send minimal information about the eligible nodes
	// assuming that the extender already cached full details of all nodes in the cluster
	NodeCacheCapable bool
	// ManagedResources is a list of extended resources that are managed by
	// this extender.
	// - A pod will be sent to the extender on the Filter, Prioritize and Bind
	//   (if the extender is the binder) phases iff the pod requests at least
	//   one of the extended resources in this list. If empty or unspecified,
	//   all pods will be sent to this extender.
	// - If IgnoredByScheduler is set to true for a resource, kube-scheduler
	//   will skip checking the resource in predicates.
	// +optional
	ManagedResources []ExtenderManagedResource
	// Ignorable specifies if the extender is ignorable, i.e. scheduling should not
	// fail when the extender returns an error or is not reachable.
	Ignorable bool
}

type ExtenderFilterResult struct {
	// Filtered set of nodes where the pod can be scheduled; to be populated
	// only if ExtenderConfig.NodeCacheCapable == false
	Nodes *v1.NodeList
	// Filtered set of nodes where the pod can be scheduled; to be populated
	// only if ExtenderConfig.NodeCacheCapable == true
	NodeNames *[]string
	// Filtered out nodes where the pod can't be scheduled and the failure messages
	FailedNodes FailedNodesMap
	// Error message indicating failure
	Error string
}

type ExtenderManagedResource struct {
	// Name is the extended resource name.
	Name v1.ResourceName
	// IgnoredByScheduler indicates whether kube-scheduler should ignore this
	// resource when applying predicates.
	IgnoredByScheduler bool
}

type ExtenderPreemptionArgs struct {
	// Pod being scheduled
	Pod *v1.Pod
	// Victims map generated by scheduler preemption phase
	// Only set NodeNameToMetaVictims if ExtenderConfig.NodeCacheCapable == true. Otherwise, only set NodeNameToVictims.
	NodeNameToVictims     map[string]*Victims
	NodeNameToMetaVictims map[string]*MetaVictims
}

type ExtenderPreemptionResult struct {
	NodeNameToMetaVictims map[string]*MetaVictims
}

type ExtenderTLSConfig struct {
	// Server should be accessed without verifying the TLS certificate. For testing only.
	Insecure bool
	// ServerName is passed to the server for SNI and is used in the client to check server
	// certificates against. If ServerName is empty, the hostname used to contact the
	// server is used.
	ServerName string

	// Server requires TLS client certificate authentication
	CertFile string
	// Server requires TLS client certificate authentication
	KeyFile string
	// Trusted root certificates for server
	CAFile string

	// CertData holds PEM-encoded bytes (typically read from a client certificate file).
	// CertData takes precedence over CertFile
	CertData []byte
	// KeyData holds PEM-encoded bytes (typically read from a client certificate key file).
	// KeyData takes precedence over KeyFile
	KeyData []byte
	// CAData holds PEM-encoded bytes (typically read from a root certificates bundle).
	// CAData takes precedence over CAFile
	CAData []byte
}

type FailedNodesMap map[string]string

type HostPriority struct {
	// Name of the host
	Host string
	// Score associated with the host
	Score int
}

type HostPriorityList []HostPriority

type LabelPreference struct {
	// Used to identify node "groups"
	Label string
	// This is a boolean flag
	// If true, higher priority is given to nodes that have the label
	// If false, higher priority is given to nodes that do not have the label
	Presence bool
}

type LabelsPresence struct {
	// The list of labels that identify node "groups"
	// All of the labels should be either present (or absent) for the node to be considered a fit for hosting the pod
	Labels []string
	// The boolean flag that indicates whether the labels should be present or absent from the node
	Presence bool
}

type MetaPod struct {
	UID string
}

type MetaVictims struct {
	Pods             []*MetaPod
	NumPDBViolations int
}

type Policy struct {
	metav1.TypeMeta
	// Holds the information to configure the fit predicate functions.
	// If unspecified, the default predicate functions will be applied.
	// If empty list, all predicates (except the mandatory ones) will be
	// bypassed.
	Predicates []PredicatePolicy
	// Holds the information to configure the priority functions.
	// If unspecified, the default priority functions will be applied.
	// If empty list, all priority functions will be bypassed.
	Priorities []PriorityPolicy
	// Holds the information to communicate with the extender(s)
	ExtenderConfigs []ExtenderConfig
	// RequiredDuringScheduling affinity is not symmetric, but there is an implicit PreferredDuringScheduling affinity rule
	// corresponding to every RequiredDuringScheduling affinity rule.
	// HardPodAffinitySymmetricWeight represents the weight of implicit PreferredDuringScheduling affinity rule, in the range 1-100.
	HardPodAffinitySymmetricWeight int32

	// When AlwaysCheckAllPredicates is set to true, scheduler checks all
	// the configured predicates even after one or more of them fails.
	// When the flag is set to false, scheduler skips checking the rest
	// of the predicates after it finds one predicate that failed.
	AlwaysCheckAllPredicates bool
}

type PredicateArgument struct {
	// The predicate that provides affinity for pods belonging to a service
	// It uses a label to identify nodes that belong to the same "group"
	ServiceAffinity *ServiceAffinity
	// The predicate that checks whether a particular node has a certain label
	// defined or not, regardless of value
	LabelsPresence *LabelsPresence
}

type PredicatePolicy struct {
	// Identifier of the predicate policy
	// For a custom predicate, the name can be user-defined
	// For the Kubernetes provided predicates, the name is the identifier of the pre-defined predicate
	Name string
	// Holds the parameters to configure the given predicate
	Argument *PredicateArgument
}

type PriorityArgument struct {
	// The priority function that ensures a good spread (anti-affinity) for pods belonging to a service
	// It uses a label to identify nodes that belong to the same "group"
	ServiceAntiAffinity *ServiceAntiAffinity
	// The priority function that checks whether a particular node has a certain label
	// defined or not, regardless of value
	LabelPreference *LabelPreference
	// The RequestedToCapacityRatio priority function is parametrized with function shape.
	RequestedToCapacityRatioArguments *RequestedToCapacityRatioArguments
}

type PriorityPolicy struct {
	// Identifier of the priority policy
	// For a custom priority, the name can be user-defined
	// For the Kubernetes provided priority functions, the name is the identifier of the pre-defined priority function
	Name string
	// The numeric multiplier for the node scores that the priority function generates
	// The weight should be a positive integer
	Weight int
	// Holds the parameters to configure the given priority function
	Argument *PriorityArgument
}

type RequestedToCapacityRatioArguments struct {
	// Array of point defining priority function shape
	UtilizationShape []UtilizationShapePoint
}

type ServiceAffinity struct {
	// The list of labels that identify node "groups"
	// All of the labels should match for the node to be considered a fit for hosting the pod
	Labels []string
}

type ServiceAntiAffinity struct {
	// Used to identify node "groups"
	Label string
}

type UtilizationShapePoint struct {
	// Utilization (x axis). Valid values are 0 to 100. Fully utilized node maps to 100.
	Utilization int
	// Score assigned to given utilization (y axis). Valid values are 0 to 10.
	Score int
}

type Victims struct {
	Pods             []*v1.Pod
	NumPDBViolations int
}